Control knob for a range



FIG. 1 is a front perspective view of a control knob for a range according to our new ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a right side view thereof. 

CLAIM The ornamental design for a control knob for a range, as shown and described. 